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Long-term Debt, Line of Credit and Derivatives - Provisions of Term Loan (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 27, 2019
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Additional principal paydown $ 18,200    
Line of Credit      
Debt Instrument [Line Items]      
Outstanding principal balance   $ 71,540 $ 73,290
Term Loan | Line of Credit      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity   60,000  
Fair value of amount outstanding   36,500  
Current portion of debt   4,100  
Quarterly principal payments   800  
Non-current portion of debt   32,400  
Outstanding principal balance   $ 36,540  
Term Loan | Line of Credit | LIBOR      
Debt Instrument [Line Items]      
Effective interest rate   3.75%